MESON Chess Problem Database

Problem Display
PID: 16369 (5rBr/n4q1n/b7/N5p1/8/7R/k1P2R1K/3Q4 w - - 0 1)

Sachsel, Robert

Chess, 1940

5rBr/n4q1n/b7/N5p1/8/7R/k1P2R1K/3Q4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.c4#
  • Tries
    • 1.Rf1?
      • threat
        • 2.Qa1#
        • 2.Qb1#
      • 1...Kb2
        • 2.Qb1#
      • 1...Qb3
        • 2.Qa1#
      • 1...Bd3
        • 2.Qa1#
      • 1...Rb8
        • 2.Qa1#
      • 1...Bxf1!
    • 1.Ra3+?
      • 1...Kb2
        • 2.Qa1#
      • 1...Kxa3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Ra3#
      • 1...Qb3
        • 2.Bxb3#
      • 1...Bd3
        • 2.cxd3#
      • 1...Sb5
        • 2.c3#
      • 1...Sf6
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);P_PINR(E)::R(C)+P(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINQ(e),P-FLIGHT::QAR1(A)
        • Q(e);::QAR1(A)
        • B(c);::QAR1(A)
        • R(g);::QAR1(A)
      • Refutation
        • B(c);XR(C)
    • Try
      • R(E);CHECK
      • Vars
        • K(a);N_SPINQ(e),P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);N_SPINQ(e),P-FLIGHT,XR(E)
  • Actual
    • Q(A);
    • Threat
      • R1(E)
    • Vars
      • Q(e);OGATE::B(G),XQ(e)
      • B(c);OGATE::R(C)+P(B),XB(c)
      • S(d);S_CUTB(c)::R(C)+P(B)
      • S(f);P_PINR(E)::R(C)+P(B)
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